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PFS and OS by IHC-based PD-L1 expression in patients with DLBCL (A and B) and GCB DLBCL (C and D). The numbers below the X-axis depict patients at risk of progression who had elevated PD-L1 and those who did not have elevated PD-L1. DLBCL, diffuse large B-cell lymphoma; GCB, germinal center B-cell–like; IHC, immunohistochemistry; OS, overall survival; PD-L1, programmed death ligand 1; PFS, progression-free survival.
